Title :
Research of preparation of novel nano/submicro-fiber catalyst
Author :
Liu, Taiqi ; Dan Lv ; Hongtao Wang
Author_Institution :
Res. Center of Ecomaterial, Beijing Inst. of Petrochem. Technol., Beijing, China
Abstract :
A novel Nano/submicro-fiber catalyst was prepared via electrospinning technology from poly (vinyl pyrrolidone) (PVP) and nano-TiO2. First, nano-TiO2 particles were added into the mixture of ethanol and deionized water, the mass ratio of ethanol and deionized water was 1:1, the TiO2 suspension was obtained after 1 h with ultrasonic treatment and centrifugal effect, Then PVP was added into the above-mentioned suspension and the content of PVP in the sol was 28%. The TiO2/PVP solution was electrospun with different voltage. The effects of the content of TiO2 and electrospinning voltage on diameter of nano/submicro-fiber were studied. The nano/submicro-fiber catalyst was characterized by SEM, TEM, XRD and FT-IR. The results show that the diameter of nano/submicro-fiber increases with a increase of the content of nano-TiO2 and decreases with the increase of electrospinning voltage. The analytical result showed that the nano-TiO2 particles were well dispersed in the matrix of PVP, moreover, the crystal type of nano-TiO2 was a mixture of anatase and rutile and the diameter of nano-TiO2 particles in the nano/submicro-fiber is in the range of 20nm-60nm and the nano-TiO2 particle was monodisperse, and the nano-TiO2 particle and PVP molecule was connected by a hydrogen bonding. This nano/submicro-fiber catalyst has a high efficiency on degradation on CH2O. 56.8 percent of CH2O was degradated under ultraviolet radiation in 80 minutes when the content of nano-TiO2 is 20% in nano/submicro-fibers.
Keywords :
Fourier transform spectra; X-ray diffraction; catalysts; electrospinning; filled polymers; hydrogen bonds; infrared spectra; nanocomposites; nanofabrication; nanofibres; nanoparticles; particle reinforced composites; photodissociation; scanning electron microscopy; titanium compounds; transmission electron microscopy; ultrasonic effects; FT-IR analysis; SEM; TEM; TiO2; XRD; anatase phase; centrifugal effect; deionized water; electrospinning; ethanol; hydrogen bonding; monodispersed nanoparticles; nanofiber catalyst; photodegradation; poly(vinyl pyrrolidone); polymer matrix; rutile phase; size 20 nm to 60 nm; submicrofiber catalyst; suspension; time 1 h; ultrasonic treatment; ultraviolet radiation; Annealing; Force; Optical fiber dispersion; Optical fiber testing; Polymers; X-ray scattering; Electrospinning; Nano-TiO2; PVP; Photocatalysis; nano/submicro-fiber catalyst;
Conference_Titel :
Materials for Renewable Energy & Environment (ICMREE), 2011 International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-61284-749-8
DOI :
10.1109/ICMREE.2011.5930607